framework1.1.8dbCDbCommand.php
最近写了个小工具来实现绑定。发现一个小问题 -.- !
/**
* 纯sql自动过滤
*
* @author caihaibin
* @param string $sql
* @param array $params
* array(':id'=>33)
* @param boolean $showError
* 表示是否打印sql错误信息
* @throws Exception
*/
function sql_execute_bind($sql, $params = array(), $showError = true, $mult = false) {
try {
if ($mult) {
foreach ( $sql as $subsql ) {
$db = Yii::app ()->db;
$cmd = $db->createCommand ( $subsql );
if ($params)
foreach ( $params as $k => $v ) {
$cmd->bindParam ( $k, $v );
}
$cmd->execute ();
}
} else {
$db = Yii::app ()->db;
$cmd = $db->createCommand ( $sql );
if ($params)
foreach ( $params as $k => $v ) {
$cmd->bindParam ( $k, $v );
}
$cmd->execute ();
}
} catch ( Exception $e ) {
if ($showError)
echo $e->getMessage ();
else {
throw $e;
}
}
}
$v 在循环的过程中，为同一个地址的变量.
bindParam的值引用为地址。导致前面参数会被后面的绑定参数所覆盖
函数名
public function bindParam($name, &$value, $dataType=null, $length=null, $driverOptions=null)
解决方式，让$v使用原来的地址即可，即&$v
/**
* 纯sql自动过滤
*
* @author caihaibin
* @param string $sql
* @param array $params
* array(':id'=>33)
* @param boolean $showError
* 表示是否打印sql错误信息
* @throws Exception
*/
function sql_execute_bind($sql, $params = array(), $showError = true, $mult = false) {
try {
if ($mult) {
foreach ( $sql as $subsql ) {
$db = Yii::app ()->db;
$cmd = $db->createCommand ( $subsql );
if ($params)
foreach ( $params as $k => &$v ) {
$cmd->bindParam ( $k, $v );
}
$cmd->execute ();
}
} else {
$db = Yii::app ()->db;
$cmd = $db->createCommand ( $sql );
if ($params)
foreach ( $params as $k => &$v ) {
$cmd->bindParam ( $k, $v );
}
$cmd->execute ();
}
} catch ( Exception $e ) {
if ($showError)
echo $e->getMessage ();
else {
throw $e;
}
}
}
补充:
http://www.laruence.com/2012/10/16/2831.html
http://weibo.com/1170999921/ylgFcpe1f
示例代码:
$arr=range(1,3);
var_dump($arr);
foreach($arr as &$val){
}
var_dump($arr);
//解决方式 参考:http://www.php.net/manual/zh/control-structures.foreach.php
//unset($val); // 最后取消掉引用
注:引用方式和原先所思考有所出入，需要查证后再做说明
验证:
$arr=range(1,3);
var_dump($arr);
foreach($arr as &$val){
if($val==2)
break;
}
var_dump($arr);
为当前变量，传递引用地址。不过php出循环的时候。。竟然没还保留。导致不小心修改了$val
如:$val =3;在foreach 之后。会导致数据被修改.
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